Gear pump



Feb- 7, 1933- 0. N. PHILLIPS GEAR PUMP Original Filed May 10, 1929 Ill/111111.

Patented Feb. 7, 1933 UNITED STATES PATENT OFFICE ORON N. PHILLIPS, OF REYNOLDS, ILLINOIS GEAR PUMP Original application filed May 10, 1929, Serial No. 362,039. Divided and. this application filed April 4, 1930. Serial No. 441,618. Renewed December 3, 1932.

This invention aims to provide a novel gear bile. The shaft has a tubular end 36 repump, the construction being such that the ceiving and journaled on the hollow bearpump will have great force, a leakage about ing 31, there being an external shoulder 37 the shaft of the pump being prevented. where the tubular end 36 is joined to the 5 It is within the province of the disclosure solid part of the shaft The compression to improve generally and to enhance the utilspring 38 is located in the chamber32 of the ity of devices of that type to which the presbearing 31. Parti-spherical buttons 39 are ent invention appertains. provided, the buttons having reduced necks Vith the above and other objects in view, received in the ends of the compression which will appear as the description proceeds, spring 38. One button bears against the the invention resides in the combination and base of the member 31, and the other butarrangement of parts and in the details of ton bears against the end of the solid part construction hereinafter described and of the shaft 35 under the action of the spring claimed, it being understood that changes 39. 15 maybe made in the precise embodiment of the The spring 38, therefore, tends to shove invention herein disclosed, within the scope the shaft 35 to the left in Figure 2, and to of what is claimed, without departing from keep the shoulder 37 of the shaft in herthe spirit of the invention. metic engagement with the inner end of the In the accompanying drawing pump casing. The result of this is that there 20 Figure 1 shows in elevation, a pump conwill be no leakage around the shaft 35, it structed in accordance with the invention; being practically impossible to keep the Figures 2 and 3 are sections taken respecgland 34 water-tight When the shaft 35 has tively on the lines 22 and 33 of Figure 1; to turn as fast as it does in a gear pump.

Figure 4 is a composite perspective view A gear 41 is secured at 93 to the tubular 25 showing one of the shafts and parts having end 36 of the shaft 35 and meshes with a to do with the bearings of the shaft; gear 42 journaled on the stub shaft 30 that Figure 5 is a plan showing a modification of is carried by the cover 27. The operation the pump casing, of a gear pump is understood by those skilled The gear pump forming the subject matter in the art, and nothing need be stated on that of this application is generally designated by subject. the numeral 5. The pump 5 includes a body In the modification shown in Figure 5, the 25 having a side wall 26. A cover 27 is atcasing 143 of the pump is of approximately tached by securing elements 28 to the body 25, rectangular outline, and has attaching openthereby to form a casing. Couplings 29 conings 144. The pipes 145 correspond to the nect the body 25 with a pipe 4 which delivers oppositely disposed portions of the pipe 4 and discharges the liquid that is being in Figure 3, but are mounted in integral nippumped. The side wall 26 carries a solid ples 146 on the side Wall of the pump casing. shaft 30 and a bearing 31 which is provided The gears are dotted in at 147. at its inner end with a chamber 32 that eX- This application contains matter divided tends almost all the way through the bearing out of in former application No. 362,039, from end to end. Into the cover 27 is threadfiled on ay 10, 1929. ed an outstanding bearing 33 with a gland Having thus described the invention, what 34 threaded upon it, a shaft 35 being jouris claimed is: naled in the bearing 33 and in the gland 34. A gear pump comprising a single, exposed A spring tongue 52 is held on the pump pump casing having a liquid inlet and a liqcasing by one of the securing elements 28 uid outlet and provided in one side wall with and cooperates with a seat 53 in the gland 34 an internal shoulder, intermeshing pump to hold the gland a ainst rotation and loosgears in the casing and substantially as wide ening. The shaft 30 can be driven from any as the interior of the casing, means for accessible part of the engine on an automomounting one of said gears for rotation, an

inwardly projecting hollow stud fixedly Inounted at one end in the opposite side Wall of said casing, a one-piece, longitudinally-inextensihle operating shaft having an enlarged tubular end receiving and journaled upon thehollow stud fwith aceuraoyof workmanship, the I shaft extending v outwardly through the first-specified side wall of said i single casing, the other of thepump gears being secured-to the "enlarged end of the shaft, the enlarged end of the shaft defining on the shaft, a shoulder shaped to abut tight der of the shaft against the shoulder of the casing, and afford aliquid-tight joint at the i it I v shoulders;thezhollow-stud forming abearing f i for the shaft and a housing for the spring. a

{In testimony that I claim the foregoing as V heretoaifixed m si nature.

my own l have a ORONAN.;P IL lPS. 

